Streptococcus sp. 기원의 Protease를 이용한 Casein Phosphopeptides의 생산

임근형,이병우,박기문,손세형,유주현 한국산업미생물학회 1993 한국미생물·생명공학회지 Vol.21 No.5

칼슘의 불용성화를 저해하는 casein phosphopeptides(CPP)를 제조하기 위하여 sodium caseinate를 기질로 하여 기존의 trypsin과는 다른 Streptococcus sp.로부터 생성된 조효소를 사용하여 최적생성조건, 생산수율 및 그 특징을 검토하였다. 최적조건은 기질농도 10%에서 조효소 사용량 1.5%, 반응온도 50℃, pH 8.0 및 반응시간 4시간으로서, 이때의 CPP 생성율은 23%였다. 또한, CPP의 분자량은 3,000∼17,000으로 확인되었으며, in vitro에서 칼슘양에 대하여 1.5배의 사용으로 칼슘의 불용성화를 방지할 수 있었다. For the production of Casein Phosphopeptides(CPP) inhibiting the insolubility of calcium, 10% sodium caseinate was treated with 1.5% of protease from Streptococcus sp.. Optimal conditions and productivity for the CPP production, and properties of the CPP were compared with tryptic hydrolysates of sodium caseinate. Optimum conditions of pH, temperature and reaction time were 8.0, 50℃, 4 hrs, respectively. Under these conditions the productivity of CPP was 23% and Molecular weight of CPP was ranged from 3,000 to 17,000. The results also showed that the insolubility of calcium was completely inhibited by using 1.5 times of CPP for the amount of calcium.

Microbial Protease 에 의한 Milk Casein Phosphopeptide 생성

임근형,이병우,박기문,안평욱,최춘언,유주현 한국미생물생명공학회 1992 한국미생물생명공학회 학술발표초록집 Vol.1992 No.-

제주산 아열대과채류를 이용한 내열성 충진물과 초콜릿을 활용한 프리미엄 과자류 개발

임근형,Im, Geun-Hyeong 한국식품저장유통학회 2015 식품저장과 가공산업 Vol.14 No.2

성인의 서혜부 탈장

임근형(Geun Hyeong Lim),권국환(Kuk Hwan Kwon),민현식(Hyun Sik Min) 대한외과학회 1991 Annals of Surgical Treatment and Research Vol.40 No.3

총수요와 장기 성장 간 관계에 대한 연구

임근형 ( Geunhyung Yim ) 한국경제학회 2017 經濟學硏究 Vol.65 No.3

최근 우리 경제에 이전과는 상이한 성장 패턴이 관측되고 있다. 실제GDP가 잠재GDP를 하회하는 마이너스 GDP갭이 지속되고 있으며 다른 한편으로 잠재성장률이 실제GDP성장률과 유사한 속도로 하락하고 있다. 그러나 장기 성장이 공급 측요인에 의해 결정된다는 주류경제학적 통념으로는 이러한 현상을 설명하기 곤란하다. 이와 같은 문제의식 하에 본고는 수요와 성장 간 장기 관계와 관련된 이론들을 살펴보고 이를 토대로 최근 글로벌 성장의 이례적 부진 현상을 평가해 보았으며 나아가 우리나라의 경우를 대상으로 총수요가 장기 성장에 영향을 미치는지 여부를 계량 분석해 보았다. 유효수요 이론과 총수요 관점 접근법을 양 축으로 하여 발전해 온 수요 중심 성장론의 관점에서 보았을 때 최근 글로벌 경제의 성장부진이 수요 부족 문제에서 비롯되었을 소지가 있는 것으로 판단된다. 노동소득분배율이 지속적으로 하락하고 있을 뿐만 아니라 투자가 저축을 하회하는 현상도 만성화했다. 특히 잠재성장률의 하락에도 불구하고 저물가 기조가 이어지고 있는 것은 수요 부족 시에만 발생할 수 있는 현상이다. Bashar(2011, 2012)의 방법론을 우리나라의 자료에 적용한 실증분석 결과 역시 총수요가 장기 성장에 영향을 미치는 요인 가운데 하나로 작용했을 가능성을 시사한다. 수요충격은 더 이상 장기 중립적이지 않고 공급충격과 마찬가지로 실질GDP 수준에 지속적인 양(+)의 영향을 끼쳤다. 더욱이 총수요와 장기 성장 간 관계는 2012년 이후 더욱 뚜렷해진 것으로 나타났다. Korean economy is now showing a new growth pattern. Negative GDP gap continues for years and potential GDP growth rate is decreasing at a speed close to that of actual GDP growth rate. But these phenomena are hard to be explained by the “conventional view” that supply factors determine long-run economic growth. On these backgrounds, this paper surveys the theoretical literature on the relationship between demand and economic growth, assesses the current low growth trend of the global economy, and conducts an econometric analysis using Korean data to see whether aggregate demand can affect long-run economic growth. The analysis focuses on changes in the link between aggregate demand and aggregate supply. Demand-led growth theory, developing with effective demand theory and aggregate demand approach as its two pillars, implies that deficiency of demand may be one of causes of recent sluggish global economic growth. The labor income share has decreased since the 1980s, a shortage of investment has been chronic, and inflation remains low despite of a decline in potential GDP. Moreover, empirical analysis, which adopts Bashar (2011, 2012)`s identification methodology, indicates that aggregate demand shocks have a permanent impact on the long-run economic growth of Korea. The result also shows that such relationship has been intensified after 2012.

표고버섯 균사체의 배양특성 및 Pilot Scale 생산

이병우,임근형,김동욱,박기문,손세형,손태화 한국산업미생물학회 1993 한국미생물·생명공학회지 Vol.21 No.6

Lentinus edodes 산련 1호의 최적배양 조건을 TGY 배지로 조사한 바 배양 최적온도 25℃, 초기 pH 4.0, 교반속도 300 rpm, 접종량 10.0%로 하고 산소 통기량을 1.0 v/v/m일 때 최적배양조건이었으며 산업용 배지로 대량생산하기 위한 액체배지에서 최적의 C/N ratio 13.1 : 1로 7일간 배양하였을 ?? 건조 균사체량은 18.8 g/ℓ을 얻었다. 또 수율 증가를 위하여 식물성장 호르몬인 2,4-D, BA를 첨가한 실험에서는 2,4-D 0.5 ppm을 첨가하여 배양하였을 때 대조구보다 1.1% 수율이 증가하였지만, BA를 첨가하였을 때 대조구에 비하여 수율이 감소하여 균사체 수율향상에 식물성장호르몬 BA는 효과가 없었다. The optimum conditions for the submerged mycelial culture of Lentinus edodes SR-1 were elucidated to be incubation temperature of 25℃, initial pH 4.0, agitation of 300 rpm, inoculation of 10.0%(v/v), and aeration of 1.0 v/v/m in TGY medium. The optimum C/N ratio and economic yield coefficient for the submerged mycelial culture were 13.1:1 and 0.45 respectively. As the plant growth hormones test, SCM medium containing 0.5ppm of 2,4-dichlorophenoxyacetic acid increased mycelial yield in 1.1%, but 6-benzylaminopurine was not effcetive.

광 마우스 기반 주행 표면 특성 추출 장치의 실험 결과

김성복,김현빈,임근형,김형진 제어로봇시스템학회 2013 제어로봇시스템학회 각 지부별 자료집 Vol.2013 No.12

This paper presents the experimental results for two different types of traveling surface samples using the optical mouse based traveling surface characteristics extraction equipment of our own design. One key to put into practice the optical mouse based mobile robot velocity estimation technique is the investigation of the changing patterns of the optical mouse velocity measurements according to a given traveling surface. In this paper, the traveling surface characteristics extraction equipment is proposed, in which a traveling surface sample is rotating with respect to an array of stationary optical mice, instead of a mobile robot equipped with optical mice traveling over a given surface. First, the conceptual design of the proposed traveling surface characteristics extraction equipment is explained, along with its prototype built in our lab. Then, for both wood and marvel traveling surface samples, the statistical parameters of the optical mouse velocity measurements are extracted, using our extraction equipment prototype.

추출조건에 따른 블루베리 열수추출물의 항산화 활성 비교

고경아,손모아,강혜림,임지희,임근형,김소미 한국식품저장유통학회 2015 한국식품저장유통학회지 Vol.22 No.3

Five extraction conditions (AE, autoclave extraction; OE, oven extraction; HWSE, hot water and sonication extraction; HWASE, hot water acidified with 0.5% (v/v) acetic acid and sonication extraction; and BE, boiling extraction) were examined to compare the effects of different hot water extraction methods on the antioxidant properties of blueberries. The extraction yields of the AE, OE, HWSE, HWASE, and BE were 7.94%, 8.35%, 8.55% 9.15%, and 8.50%, respectively. The polyphenol and flavonoid contents of AE were 3.47 mg GAE/g and 1.59 mg RE/g, respectively, which were highest centents among others. Those of OE were ranked second to the highest. The total anthocyanin content of HWSE (5.29 mg/g) was significantly higher than that of others whereas that of AE showed the lowest content (0.96 mg/g). The order of ABTS radical and alkyl radical scavenging activities was as follows: AE > BE > OE > HWSE > HWASE. The antioxidant properties were considerably correspondent with the total polyphenol and flavonoid content. DPPH radical scavenging activity was quite high in HWSE, AE, and BE extraction, however, there were no significant differences among the five extraction methods in the aspect of Fe2+ ion chelating activities. Moreover, AE showed the highest SOD activity, and protected the dermal fibroblast the best against H2O2-induced cytotoxicity. In conclusion, it was suggested that the autoclave extraction (AE) would be the most effective method for preparing blueberry hot water extracts with relatively high antioxidant activities.

Comparing the Effectiveness of the Monetary Policies in Korea and Japan

김상기(Sang-Kee Kim),임근형(Geunhyung Yim) 서울대학교 경제연구소 2021 Seoul journal of economics Vol.34 No.2

This study conducts a comparative analysis of the monetary policy transmission channels and their effects in Korea and Japan using a sign restriction VAR model to determine whether a Japanese-style monetary policy can be implemented in Korea. Results indicate considerable differences between Korea and Japan in their monetary policy transmission channels. Conventional monetary policy transmission channels, such as the exchange rate channel, asset price channel, and bank lending channel, works relatively well in Japan. However, in Korea, the interest rate channel is effective but has only a short-term effect on the exchange rate, and the effects on asset prices and bank lending are hard to expect in general. Furthermore, some potential risks working through the housing market may hinder financial stability. Korea and Japan see a limited effect on production in the real sector. These results imply that Korea must be careful about implementing a similar monetary policy as Japan.

광 마우스 배열을 이용한 주행 표면 특성 시험 장치의 속도 기구학

김성복(Sungbok Kim),임근형(Geunhyung Lim),김형진(Hyungjin Kim) 대한전기학회 2013 대한전기학회 학술대회 논문집 Vol.2013 No.10